Pedestal punch



June 12, 1923.

.1. DlTSON ET AL PEDESTAL PUNCH Filed June 4, 1921 ANH Fatented June 12, 192%,

unit stares PATENT QFFHQCE;

JESSE DITSON AND ARTHUR E. PETEEE, OF LITTLETON, COLORADO, ASSIGNORS TO INGERSOLL-BAND COMPANY, OF JERSEY CITY, IIE'W JEEJMEY, A CORPORATION OF NEW JERSEY.

PEDESTAL PUNCH.

' Application filed June 4,

To all whom it may concern:

Be it known that we, Jnssn DrrsoN and ARTHUR E. Pnrnns, citizens of the United States, and residents of Littleton, county of Arapaho state of Colorado, have invented a certain Pedestal Punch, of which the following is a specification, accompanied by drawings. f

This invention relates to machines for punching hollow drill steels and similar articles, but more particularly to a pedestal punch in which the punching mechanism is mounted at one side of a pedestal or other support and the clampingmechanism for clamping the hollow article is mounted at the other side of the pedestal, although my improved clamping mechanism is capable of use in other arrangements, and not necessarily with the particular form of punching no mechanism shown herein, the details of which punching mechanism are disclosed in our co-pending joint application, Serial No. 435,476, filed January 6, 1921. The objects of the present invention are to secure a simple and eflicient pedestal punch combining punching mechanism and clamping mechanism capable of being readily assembled and disassembled, and mounted on a pedestal with few parts which do not readily get out of order under frequent and hard usage. Another object is to produce a clamping mechanism capable of aligning and centering various sizes of drill steels Within its range and is at the same time quick in operation, both in gripping and releasing the steel and holds equally rigidly in both directions;

Our application is shown in one of its preferred forms in the accompanying drawings in whichf Figure 1 is a side elevation partly in longitudinal section of a machine embodying the invention;

Figure 2 is a transverse vertical sectional view on the line 22 oi: Figure 1 looking in the direction of the arrows;

Figure 3 is a detail sectional view of the vise jaw levers in open position;

Figure 4: is a detail perspective view of the female vise jaw lever, and

Figure 5 is a similar vview or" the male vise jaw lever.

Referring to the drawings, the pedestal A is provided with the head B having a bore 1921. Serial No. 474,888.

through which a guide bar 0 is adapted to be passed horizontally and held in position by means of the tightening bolt-s D. The guide bar C forms a ready and convenient common support and guide for both the fluid actuated punching mechanism E preferably slidable upon one projecting portion of the guide bar and the fluid actuated clamping mechanism F adapted to be suit-v ably secured to the opposite projecting porwhich the guide bar (1 passes, and afluid' pressure cylinder L preferably of the hammer type may be provided with a hammer piston (not shown) adapted to impart blows of impact to the punch H for driving it into the article to be punched. j

The punching mechanism may be moved back and forth on the guide bar G in any suitable manner as for instance by means of the hand operating lever O pivoted at P on the pedestal A and connected to the lug Q on the casing of the punchingmechanism by means of the link or red R, pivoted to the lever O at the point S. The connecting rod B; may be provided with the collarvT and a cushioning spring U is arranged between said collar and a washer V bearing against the lug Q. Another cushioning spring W is arranged between the washer X and an adjusting nut Y on the screw threaded end 7:: of the connecting rod. By manipulating the hand lever O the punching mechanism E may be pulled toward the article to be punched and pushed away from the article when the punching operation is completed.

The guide bar C is preferably provided with a longitudinal groove a and the casing is provided with a key or feather 12 secured thereto by means of the screws 0 so that as the punching mechanism is moved forwardly and backwardly, the key I) maintains the punching 7 shown in thisin'stance as a valve of the poppet type, having a valve stemgn' back head (Z is provided with the supply.

The

passage h leading to the cylinder.

The outer end of the guide'bar C is pro vided with a cam surface 7' in the form ofla "groove in the guideand a hardened tappeto is adapted to move vertically in a socket 712 in the rearward extension Q of the cas ng J.

' A locking pin r extends into the groove 8 in the'tappet to limit its movement. The stem 'g of the poppet valve 7 extends through a removable screw threaded plug it forminga valve'cage so thatthe valve as well as the" valve cage may be removed for grinding.

Thevalve stem -g-is adapted to bear on the tappet oand with the parts in the position indicated in Figure 1, thetappet 0 lies on the cam surface j and the controlling valve f is closed; In such position the casing of the 1 against the stop a as indicated in Figure 1.

punching mechanism lies against the stop a secured tohthe-rearward end ofthe guide bar C as by means of the cap screw 0.

Instartingthe punching mechanism in operatio n, the initial movement of the casing J forwardly along the guide bar C towards. "the article to be punchedjcauses the tappet 0 to move out of the groove forming the cam surface j-and pushes the poppet valve v0 open thus admitting live fluid pressure to the hammer cylinder L. The valve 7 is main "tained open during the forward and backward movement of thepunching mechanism and automatically closes when the punching mechanism is returned to its initial position i YTheclampin'g mechanism F for clamping the drill steel or other article to be punched comprises a vise head 2 provided with a'sleeve' or body portion 3 adapted tobe passed over the opposite projecting end of the guide bar C and held upon. the'guide 7 bar by. means of the stop" 4 and cap screw 5.

yoke adapted to be secured acrossthe lower Y Set screws 6 assist'in holding the vise head infproper position and alignment onth'e guide. bar; I r

in apiston rod guide 10 inzthe form ofa open end ofthe Cylinder 7 as by means of the bolts ll, A spring12 is adapted to be 'compressedbetween the piston and the pistoiirod guide 10 when the piston is forced outwardly and downwardly in the cylinder 'so that ,the'sp'ring returns the piston in the cylinder. vMotive fluid "is supplied to the cylinder: through the connection 13 and "support, a guide bar carried by. 1

supply port 14: controlled by the throttle means of the pin 17 about which the levers are adapted to rockin clamping and releasing the drill steel G or other article to be punched. The female lever 18 is'forlzed or double inform and provided with the jawhead 19, and the tongue 20 of the male lever 21' is adapted to befinserted between the double or forked portion or the female lever so that the clamping head" 22' lies opposite the clamping head 19. Hardened vise jaws 23 and 24 are adapted tobe removably se cured to the jaw heads of the levers, as. by means of the'bolts 25'. f I

The outer-ends of thevise jaw levers 18 and 21 are pivotally connected as showmtq the piston S of the cylinder 7' by suitable A operative means shown in this instance lift levers 26 pivoted at 27 to the vise jaw,

levers and pivoted at 28 to the skirt of'the piston. As the piston 8 moves downwardly the j aws are closed and theyare released and i opened when the piston moves upwardly andinwardly.

The extensions 29 on the vise head2 "I which the vise jaw levers are pivoted as shown, extend upwardly at each side of the lever jaws and are hollow or concave informas indicated in Figures 2'a'nd 3 to form rests for the drill steel or other 'articlefto be punched upon whi'ch'the article is placed when the jaws are open as "indicatedin'Figi ure 3. When-thejaw's move toward each other to'closed position the drill steel is picked up by the vise jaws'andcentered' automatically as indicated in Figures and I ingjaws open. Fluid-is admitted to 'the cyL inder"? and the pisto'nS is forceddownwa'rdly therebyrocking the vise jaw levers e v on their pivot 17 and automatically clamp The'vise head: 2 is provided with a fluid pressure cylinder 7 having a reciprocating xpiston 8 the piston rod 9' ofwhich isguided ing and centering the article to be punchedin theposition indicated in Figure 2." The manual operating lever O is then-fgrasped by the operator and the punching mechanism ispulledtowa'rd'the article to be punchedso I J A'machine ir n hing honowd'rilil a an epport, punch ng mechanism slidab upon steels and similar articles, comprising a guide bar, a vise head adapted to be sleeved over said guide bar, jaw levers pivoted on said vise head, a cylinder and fluid actuated piston for said vise head, lift levers operatively connecting said piston and the jaw levers, and means for controlling the operation of said piston.

2. Clamping mechanism for a punching machine comprising a vise head, a vertical cylinder and fluid actuated piston therein, horizontally extending jaw levers pivoted to said vise head above the cylinder, lift levers operatively connected to said jaw levers and piston and means for controlling the supply of motive fluid to said cylinder, whereby downward travel of the piston rocks the jaw levers to clamp an article to be punched.

3. A machine for punching hollow drill steels and similar articles, comprising a support, clamping mechanism mounted on said support and consisting of a vise head, jaw levers pivoted on said vise head, a cylinder and fluid actuated piston for said vise head, lift levers operatively connecting said piston and jaw levers, means for controlling the operation of the piston, and punching mechanism mounted on the support and movable to and from the clamping mechanism.

at. A machine for punching hollow drill steels and similar articles, comprising a support, clamping mechanism mounted on said support and consisting of a vise head, a vertical cylinder and fluid actuated piston therein, horizontally extending jaw levers pivoted to said vise head above the cylinder, lift levers operatively connected to said jaw levers and piston, means for controlling the supply of motive fluid to said cylinder, whereby downward travel of the piston rocks the jaw levers to clamp an article to be punched, and punching mechanism mounted on the support and movable to and from the clamping mechanism.

In testimony whereof we have signed this Specification.

JESSE DITSON. ARTHUR E. PETERS. 

